When studying wildlife populations, biologists sometimes use a technique called “mark-recapture.” For example, a researcher captured and tagged 30 deer in a wildlife management area. Several months later, the researcher observed a new sample of 80 deer and determined that 5 were tagged. What is the total number of deer in the population?

On a particular night, a baseball stadium sells 60% of its seats, and of those, 15% do not end up showing up to the game.  Assuming everyone present is sitting in a seat, what percentage of seats in the stadium are empty?

The US population is 13% African American.  If you were to take a SRS of 500 Americans, below what proportion will we find 50% of our sample proportions?

Please see picture

86% of Boston residents think chemistry is awesome. How many Boston residents would need to be sampled to find 1450 people who think chemistry is awesome?

At a recent home football game, the Falcons surveyed fans to name their favorite Falcons player. What type of data was collected?     Bivariate and Quantitative     Bivariate and Categorical     Univariate and Quantitative     Univariate and Categorical

Of a graduate school that has 2000 business majors, 500 finance majors and 300 biology majors, a researcher starts at the least-numbered student ID and continues until she has collected the names of 200 business students, 50 finance students and 30 biology students. What type of sampling technique does this represent? Explain your reasoning.

An interdepartmental task force is being formed to investigate an increase in violent crimes. 1/5 of the task force will be police officers from the local precinct. 1/4 will be ATF agents, and the remaining 22 will be from the FBI. How many people are participating in the task force?

Suppose 20% of the students on campus smoke. You select two students at random. In what percentage of samples will both students be smokers?

A hospital report indicates 25% of its patients had an MRI in January. If 1,060 patients were hospitalized in January, how many had an MRI?